It's more likely in the sense that they are pressing, tensing, etc. much more than in normal behavior during breeding behavior. My first season I paired after 48 hours and did have this happen, actually. I didn't feed her for 2 weeks but otherwise continued as normal. She produced 5 healthy eggs and had no other health issues. Keep a close eye on her but I wouldn't worry too much. How big was the rat and how big is she? If they're far along in development there is less room inside for a big rat to pass through, so many people reduce to smaller meals more often once building.
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